| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Recent Advancements in the Mediating and Shielding Effects of Dissolved Organic Matter During the Degradation of Organic Pollutants by Biochar |
| ZHANG Kaiyang1,2, GUAN Yousen1,2, YI Peng1,2, HUANG Yu1,2,*, CHEN Quan1,2, WU Min1,2
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1 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;
2 Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Kunming 650500, China |
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Abstract Dissolved organic matter(DOM) with complex chemical structures is present universally in natural environments and significantly influences the environmental behaviors and fates of co-presence contaminants. Biochar rich in pore structures and surface functional groups highlighted a promising solution towards sustainable organic pollutant remediation through physicochemical adsorption, direct electron transfer, and free radical induction. However, the environmental functions and effects of biochar may be altered by the inevitable interaction with DOM in actual water and soil environments. Understanding the impact of DOM on the biochar-based degradation of organic pollutants enhances insights into the precise biochar application in such mitigation schemes. In this concept, we elucidated the behaviors and mechanisms of the DOM-mediated or -inhibited organic degradation in biochar systems by recruiting the available literature base. Our analysis confirmed that DOM exhibits a dual role during the biochar-based degradation of organic pollutants. On the one hand, DOM can facilitate the generation of free radicals by interacting with biochar and acting as an electron shuttle, thus enhancing the organic degradation. On the other hand, DOM can clog biochar's pore structures, quenc-hing free radicals and occupying active sites on the biochar surface, thereby hindering the pollutant degradation. We end up by summarizing the acquired evidence related to the regulation strategy of organic degradation by biochar with particular DOM structures. This review extends the theoretical foundation for structural regulation of biochar-based organic pollutant remediation and its potential application in actual environments.
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Published: 25 March 2026
Online: 2026-04-03
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2026, Vol. 40 
